DSD: Difference between revisions
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==Overview== |
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DSD is the format used for Super Audio CD's. Please see the article on [http://en.wikipedia.org/wiki/Direct_Stream_Digital DSD at Wikpedia] more information. |
DSD is the format used for Super Audio CD's. Please see the article on [http://en.wikipedia.org/wiki/Direct_Stream_Digital DSD at Wikpedia] more information. |
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==Playback== |
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By default, DSD will be converted to PCM for playback. |
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The DSD to PCM conversion process converts from 1-bit DSD to 64-bit PCM at 1/8th of the sample rate. The total amount of data from this conversion grows by 8x, so the process is effectively lossless / perfect. |
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Once you have PCM, it will be 64bit @ 352.8 kHz for DSD, and 64bit @ 705.6 kHz for DSD 2x. |
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It is rare for hardware to support these high sample rates, so downsampling is required. The option 'Greater than 192kHz' in DSP Studio > Output Format is what is used. There is no way to configure DSD 1x and DSD 2x independently. |
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The final note is that a low pass filter at 30 kHz with a 24 dB/octave slope is used to remove the (basically) pink noise present in the upper frequency with DSD. |
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==Bitstreaming== |
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It is also possible to bitstream DSD to certain DACs using ASIO 2.2, in which case the DSD to PCM conversion is not performed. |
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Your DAC must support it. Only a few do. |
Your DAC must support it. Only a few do. |
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DAC's that support DSD include: |
DAC's that support DSD include: |
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[http://playbackdesigns.com/ Playback Designs] |
[http://playbackdesigns.com/ Playback Designs] |
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==DSD Sources== |
==DSD Sources== |
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==Ripping Super Audio CD's== |
==Ripping Super Audio CD's== |
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Article at computeraudiophile.com on [http://www.computeraudiophile.com/content/SACD-ripping-using-your-PS3-part-2 ripping SACD's] on an old PS3. |
Article at computeraudiophile.com on [http://www.computeraudiophile.com/content/SACD-ripping-using-your-PS3-part-2 ripping SACD's] on an old PS3. |
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Revision as of 18:08, 20 February 2012
Overview
DSD is the format used for Super Audio CD's. Please see the article on DSD at Wikpedia more information.
Playback
By default, DSD will be converted to PCM for playback.
The DSD to PCM conversion process converts from 1-bit DSD to 64-bit PCM at 1/8th of the sample rate. The total amount of data from this conversion grows by 8x, so the process is effectively lossless / perfect.
Once you have PCM, it will be 64bit @ 352.8 kHz for DSD, and 64bit @ 705.6 kHz for DSD 2x.
It is rare for hardware to support these high sample rates, so downsampling is required. The option 'Greater than 192kHz' in DSP Studio > Output Format is what is used. There is no way to configure DSD 1x and DSD 2x independently.
The final note is that a low pass filter at 30 kHz with a 24 dB/octave slope is used to remove the (basically) pink noise present in the upper frequency with DSD.
Bitstreaming
It is also possible to bitstream DSD to certain DACs using ASIO 2.2, in which case the DSD to PCM conversion is not performed.
Your DAC must support it. Only a few do.
DAC's that support DSD include: Playback Designs
DSD Sources
http://www.ps3sacd.com/dsd_downloads.html
Ripping Super Audio CD's
Article at computeraudiophile.com on ripping SACD's on an old PS3.